/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.test.rest.yaml.section;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.opensearch.common.collect.Tuple;
import org.opensearch.common.xcontent.XContentLocation;
import org.opensearch.common.xcontent.XContentParser;

import java.io.IOException;

import static org.hamcrest.Matchers.instanceOf;
import static org.hamcrest.Matchers.lessThanOrEqualTo;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;

/**
 * Represents a lte assert section:
 *
 *   - lte:     { fields._ttl: 0 }
 */
public class LessThanOrEqualToAssertion extends Assertion {
    public static LessThanOrEqualToAssertion parse(XContentParser parser) throws IOException {
        XContentLocation location = parser.getTokenLocation();
        Tuple<String, Object> stringObjectTuple = ParserUtils.parseTuple(parser);
        if (false == stringObjectTuple.v2() instanceof Comparable) {
            throw new IllegalArgumentException(
                "lte section can only be used with objects that support natural ordering, found "
                    + stringObjectTuple.v2().getClass().getSimpleName()
            );
        }
        return new LessThanOrEqualToAssertion(location, stringObjectTuple.v1(), stringObjectTuple.v2());
    }

    private static final Logger logger = LogManager.getLogger(LessThanOrEqualToAssertion.class);

    public LessThanOrEqualToAssertion(XContentLocation location, String field, Object expectedValue) {
        super(location, field, expectedValue);
    }

    @Override
    protected void doAssert(Object actualValue, Object expectedValue) {
        logger.trace("assert that [{}] is less than or equal to [{}] (field: [{}])", actualValue, expectedValue, getField());
        assertThat(
            "value of [" + getField() + "] is not comparable (got [" + safeClass(actualValue) + "])",
            actualValue,
            instanceOf(Comparable.class)
        );
        assertThat(
            "expected value of [" + getField() + "] is not comparable (got [" + expectedValue.getClass() + "])",
            expectedValue,
            instanceOf(Comparable.class)
        );
        try {
            assertThat(errorMessage(), (Comparable) actualValue, lessThanOrEqualTo((Comparable) expectedValue));
        } catch (ClassCastException e) {
            fail("cast error while checking (" + errorMessage() + "): " + e);
        }
    }

    private String errorMessage() {
        return "field [" + getField() + "] is not less than or equal to [" + getExpectedValue() + "]";
    }
}
